Windows-7 installation questions

[Grr]

Some questions on installing W7:

1. How to get the product/license from my already pre-installed OS?
Answered
2. Where to get the DVD for W& PRO 64-bit
Un-Answered
3. If i do a fresh install will my existing recovery partition be lost?
Answered
4. Will the existing license allow new installation on the same hardware & validate?
Answered

5. Could someone confirm the following hash codes for

X64 DVD Image W7 PRO:
CRC32: 502C42C1
MD5: 7B7AF5FE3A01E9FD76DE4DACB45A796B
SHA-1: 50127304441A793EE51B3F501289F6599A559E9F


X32-DVD Image W7 PRO:
CRC32: 578725D1
MD5: D8F675AAEB48057452666B0CD686D7F5
SHA-1: 697FA06554502FB21D30275273B25747299C020D


6. Does deleting ei.cfg file makes the DVD as all version DVD?
7. How to Make new laptop Dual boot with XP-sp3 & W7 PRO-64-bit




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Will keep asking questions in this same thread.

Thanks,
Grr