Low Performance - Please Help

[USAL]

Hello
My friend and I was just planning to play JO together on LAN ,but we have encountered a problem. He's notebook power isn't enough to run it. I have tried to change resolution or details...But no luck;/. The spec. is:

Pentium IV 1,8 Ghz
Radeon mobile 7500 64 MB RAM AGP x4
256 SD-Ram 133
HDD 30 gb.

I know 7500M isn't good ,but my another friend run it on min on Geforce 2 ,and it was playable. But maybe the type and size of ram cause game to lag?(In req. it says 256 min but DDR) If anyone had some advice ,please help
(Sorry for my bad english)