lucky. in my 1ZZ, you have to remove the camshaft to get to the valve spring (and the stem seals)Looks like you need special service tool (SST) 09248–77010you can supposedly order one from
http://toyota.spx.com, just pretend you have a celica (they list it as part number 09248–77010-01)
http://toyota.spx.com/detail.aspx?id=245&g=12I have no idea what one costs, or if there is a place where you can rent one.