Ive recently updated my development machine to windows 7 64 bit and have tried to install my copy of entity spaces (2008 developer)

It wont install, I get error messages

error opening file for writing

C:\Program Files (x86)\EntitySpaces2008\Documentation\EntitySpaces_Codesmith_getStarted.pdf

and

C:\Program Files (x86)\EntitySpaces2008\Runtimes\.Net2.0\EntitySpaces.Core.dll

and so on

how can I fix this ?