'is not a valid virtual path' - IIS host header help

[msimon7]

hello.
i'm trying to setup a website on my local server
when compiling it VS 2005 i get the error
"is not a valid virtual path"

from what i've read on the net, this is due to the fact that the site
is using IPort, which is no longer supported in VS 2005. I have to
use the IPort setup 192.168.2.102:8080 as my ISP blocks port 80

this is just a dev site, but i would like to access it externally,
hence the port 8080. I've read that a few people got around this
issue by using host headers. but i have yet to find an example of
how. anything listed out on the internet refer to only using port 80.
was hoping someone could help me with my setup of how to setup my site
to user IP:8080 and point to port 80 as well via host headers so that
the site can be built/compiled in VS 2005.
I assume i then have to make a DNS entry, host file entry or WINS
entry so that the site is accessible via the host header name. any
help with that would be appreciated greatly as well

my server is Win2003 w/ IIS6. and .net 2.0

thanks for any help