PS to Tiff is a windows application which can directly convert ps/eps to tiff formats. It supports multifarious compression of tiff image,such as LZW, JPEG, PACKBITS, CCITT Group3, CCITT Group4, RLE etc.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.