|Go to www.crucial.com and run their memory advisor tool - it will tell you what memory is compatible with your laptop. There is no problem in having 1gig and 2gig chips alongside each other, it's whether they have the same characteristics that is the important part - that's where Crucial will help.|
With 32bit Vista you can upgrade to 4Gb, as long as your laptop's motherboard can take it, but the operating system will only make use of about 3.3Gb of that. (4Gb is the maximum that can be accessed by 32bit Windows, but you lose the rest due to the way Windows uses the memory).
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd