We have a requirement to migrate some websites (which contains only
static HTML/PHP/ASP pages) to SharePoint(MOSS). Could somebody give
what are the options available for this.

one option could be, Customize the master page as per the site
requirement and create page layout page for each corresponding static
HTML/ASP/PHP page and copy-paste the content. This could be very much
time consuming.Is there any better way to do the same?

I'm also exploring the option of using website migration manager for
sharepoint tool
(www.metalogix.net/.../index.htm) from
metalogix. If anybody has used this tool before then please let me
know how useful this tool would be.