So, the current system we use makes you reply using RE: Topic.
Whenever the conversation gets long enough it eventually turns into :
RE: RE: RE: RE: RE: RE: Topic.

This is quite annoying to me personally as sometimes the titles go off the screen.
This makes me open multiple messages to find the one I'm looking for.

The other problem would be all the block-quotes that gather up during the process.
This makes the message unnecessarily long.

So here is my suggestion.
PMs would work similar to a thread on the board but between two people.
This means instead of having multiple messages the topic would be all under one page.

This would save the constant RE: RE: RE: and the block-quotes taking space up.

mrfe gave another idea,
"Just had a thought... Coding should be disabled. By that, I mean that if users type in code, it should show up to other users."

That is surprisngly a good idea that I have never thought of. >.< 
I second the motion of putting this into place.

I like the idea in theory. Just as long as the result makes sense.

I'm pretty sure the PM system already runs on separate numbering and what not. I wonder how it would have to change in order to remain private though. Changing the system would change how the security would need to function. Probably have to make it so that the sender and the receiver are the only authorized people who can view "thread".

I do like the idea though. Each PM between people would become it's own "thread".

I guess this system might also introduce the ability to have multiple people in on the PM.

I think the idea has merit and we can make it quite useful

Since this has been met with good responses, I'll summon some people whom may like this idea,

Jordanv78 :
pacman1755 : I'm sure Global mods like yourselves would like this system as I'm sure you get messages frequently.

tRIUNE : I could understand why this would be helpful for you for people whom wish to have their hacks on vizzed.

ruesen :
austipokedude :
Seishiro Leonhart :

mrfe : This would be helpful for when we discuss coding as the current way we do so can be slightly challenging for other users.

sonicmcmuffin : say if you were to do another all-nighter, geeogree's idea of "ability to have multiple people in on the PM. "
Bintsy :   would be very useful for you guys.

I have to say I like this idea also,if it meant reducing the long series of RE indicators at the start of every replied message I'm all for it. It may also help fix the problem of PM's not appearing for people, that has gotten progressively bad in my case, I'm sure I'm not alone in this.

Yeah sounds like a good idea. What I do when sometimes (rarely) is delete previous bockquotes as well as the number of "RE's" in my reply.

iN008 : Hack requests haven't ever got that far into a PM.

This is a good concept, though, just needs someone who can do it to do it.

tRIUNE :
I was more referring to a single hack such as one which is on the RGR but still in alpha / beta.
This means it could updated using the same "thread" as it were.

Just had a thought... Coding should be disabled. By that, I mean that if users type in code, it should show up to other users. If david were to make this a thread type thing, than we couldn't share code anymore. Not saying that's a terrible thing, except that if that were to happen I couldn't do my profile layout shop. I have to send the code via pm.

mrfe : Actually you could still use the reply to get it since in threads you can see what they posted below

iN008 : But you can't see code... For example, when I make this text green, you can't see the tags I used.

If you reply to a thread you can't see the code from the person above. 

earthwarrior :
This wasn't just for code...

I recommend you re-read the first post

I was explaining what mrfe said but he ninja'd me. 

Its not like it isn't good. I personally don't mind the system, but I wouldn't care if this was implemented. 

Davideo7 : what do you think?

I actually saw this idea on another forum and I did like it. I do plan to eventually redo the private message system and when I do, I'll probably be doing something like this.

I've got a few other ideas for a new PM system as well but it'll be a while before I have the chance to remake the entire system since that'll be a big job.