hi ! is my first reply and i want to thanks all for this wonderful site^^
so, is an sim3pack and for install it you must double click on file
for the size ,i say like i make , you must search an big house ( there is only one 64x64) leave the family from it ( can you copy the house in inventary or destroy it) and change the lot empty from residence to commercial,so you can put the laboratory ^^
sorry for my bad english i hope that you understand me
and thanks to ellatrue for this ^^