Old MoBo More RAM?

After much thought I've decided not to give up on my old desktop, at least for the moment, and to try and keep it going another 6 months to a year (waitng for the lastest flightsim specs before building the new one). I've looked around at various inexpensive (spelled C-H-E-A-P) upgrades to get me along that far. After some review I've decided I'll just go ahead and throw in a new vidcard and PSU and possibly some RAM (looks like maybe $200 overall).

My question is whether or not I can put in more RAM or not. I have an old Compaq 6370US (P4 2.53Ghz) desktop and I can't seem to find what MoBo is actually in it. After some searching it seems 1 gig of RAM is the max that was originally supported. I've heard of others putting more RAM in older computers so I thought it may be possible to do so with mine.

I don't know if max RAM is a funtion of MoBo BIOS (which could possibly be editted?) or maybe when the computer was new (2001-02) it was all XP supported. Any thoughts on this? Is it possible the MoBo might recognize more than the current 1 gig without any changes other putting it in? I have XP Home+SP2 on it for an OS and have never seen/messed with th BIOS on the MoBo.

Any help would be great. Thanks in advance.

Stretch

I use it to play flightsims occasionally and check email at the moment. Really I'm not a "gamer" so much and the sims I play don't use the newest graphics engines like FlightsimX (IL2/Pacific Fighters, Lockon and Wings Over Vietnam). Lately though, with all the latest patches and upgrades installed, the loading times for these sims has gotten fairly long. I figured a bit more RAM could help this as well as smooth out gameplay a little more. These games are far from graphics intensive like Crysis or CoD4 from what I've seen so crazy upgrades are not needed to get by at very high/max graphics settings.

Stretch