Update
btw
Pentium Core2 Duo T5800 @ 2.00GHz
4Gb Ram (2.99 recognised)
Windows XP SP3 (Build 2600.xpsp_sp3_gdr.090804-1435)
Swapfile defragged.
Still sits at 122mb.
And now I think about it, I've merged a few files with the registary in the last week or so and TT hasn't even noticed... Think it's going to be disabled until this problem is sorted out.
Further, TT doesn't climb to 122mb, it starts there! Upon running, it opens at 122mb then climbs to 140, then drops back down to 122 and sticks around there.