>By the way, I use LTSpice/SwitcherCAD from Linear Tech.

Then it is probably worth asking on their Yahoo group. There are some very 
knowledgeable guys there on converting models. You may even find someone has 
already done it for the device you want.

http://groups.yahoo.com/group/LTspice/ 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist