for anyone nervous about doing all this.
I have a T61 with intel x3100.
I put the middleton bios on it last year and have run a T8300 processor since then.
if you work in the following order you can do the 1066fsb upgrade with the MINIMUM of risk.
1. get yourself a SPARE 2 gig ram chip. take your normal ram out of the t61 and put the spare ram chip in.
flash the spare ram spd chip according to the instructions . check it with cpu-z .
if you cannot do this - stop right there. no point in going any further - if it goes wrong - you've blown a ram chip and you can
put your regular ram in and you are fine. no harm done. don't go to part 2 unless this part has worked.
2. assuming part 1 has gone well then you can make a dos usb stick and phlash the "amanish" bios according to the instructions.
I have just done these two steps - and I have not had to do any board modifications.
The T61 runs JUST fine with the T8300 and the modified RAM with the "amanish" bios.
so at this point all I have had to do is change the RAM, write the ram spd and phlash the amanish bios.
(if you are going quad core - the amanish bios is the wrong bios)
3. step 3 is buy a T9400 cpu off ebay for £15 - wait for it to arrive from china!
when it has arrived - then and only then do you cut the mainboard, solder on the wire and put in the T9400
assuming step 3 goes well - ive not done step 3 yet - then I can shell out for a faster chip - the T9400 is the cheapest 1066 fsb chip and the one to "prove"
the principal with.
im not going to bother with any of the quad core mods on my T61