Cygwin and Native Windows Install of Postgres

Dear PG Novice List,

http://pginstaller.projects.postgresql.org/faq/FAQ_windows.html#3.1 says
to remove cygwin\bin from the path before running "the installer or the
installed version of postgresql", but it is completely silent and does not
offer *any* clues as to what to do afterwards, e.g. paths, DLLs, etc.

Using Cygwin tools we have been building lots of cross-development
applications for robots, including maintenance of stuff already in the
field, so we don't want to muck up the current toolchains.

Now I need to install postgresql to maintain an application which will run
on a PC which uses the 'native' version of PostgreSQL 8.1, not the cygwin
version.

What should I do so that I can have both environments (cygwin &
windows-native postgresql) on my work PC?

Should I buy a second PC?

Should I use different logins?

Should I use a fudge such as run-application-as-different-user? Services
as different user?

--
Regards,
Alf Lacis
Senior Software & Design Engineer
A.i. Scientific Pty Ltd
10-22 Hornibrook Esplanade
CLONTARF QLD 4019
AUSTRALIA
Ph: (+617 or 07) *3105 5087*
http://www.aiscientific.com/