hi ....
what i do is =====>
i open 1000 SC, 1000 CR and 1000 RC...
then i CUT the first 20 questions from 1000 SC and paste it into a blank word document...
then i CUT the first 15 questions from 1000 CR and paste it into a blank word document(ahead of the 20 SC questions that i pasted just now..)...
then i CUT the first 4 RCs from 1000 RC and paste it into a blank word document(ahead of 15 CRs)...
Normally the RCs would have 7-8 questions in the 1000 RC document...
so i choose some 4-5 qustions for each RC in the new document..which i name as TEST1.doc.....
Then i change the order of the questions...
ie. some 2-3 SCs in the beginning...followed by 2-3 CRs..followed by 1 RC....
something like that...
so my TEST1.doc contains 20 questions of SC, 15 of CR and 15 of RCs...
This is what an actual gmat verbal section would look like...

...
thats it.!!..
BTW, with above configuration, you would have arnd 50 tests...