If you want to create a full flash site, maybe you need to import the whole .
psd file into flash, but if you want to create banners, you can import the parts you need only.
for example if you created a template with a header, you can simply create a separate .
psd file for the header and import it to flash and work on it, not entire template.
I dont know if it helps you or not, ask me if you need more details..