Help pimp my crap PC cheaply

[Transference]

Help me maximize my EV by spending the minimal amount of cash.

Here is my super ghetto setup:

700mhz processor
352 RAM
Windows 98
Nvidia Aladdin TNT2 and NVIDIA GeForce4 MX 4000
1 19" Monitor and 2 17"
1 crappy 200mhz laptop for pokertracker
Free Dialup

This is pretty much a poker only machine. My number one interest is maximizing the number of tables I can play. Currently 3 tables on empire is a shade laggy.

My first guess is that upping my RAM is the most essential upgrade and can be done pretty cheaply. I've also heard that win98 doesnt manage memory well, but I think the RAM upgrade would help more than an OS upgrade. BUT could dial-up be the bottle neck? Should I just upgrade to DSL and keep saving for a new machine?

Obviously the best move is just to replace this thing, but I'm prepared to sink another 200 or so into this one while I save for something better.

Thanks for your suggestions