Yea,SiSoft will tell you if its cas1 or cas2 and if its pc100 or pc133. It will also tell you what brand name it is as long as its not generic in which case it will be identified as generic memory.
[edit]oh yea,make sure to use the mainboard information module,thats the one that will tell you what you want even though you'd think the memory module would. Just scroll down the list and there it will be.