For example add into /etc/apt/sources.lists
following lines:
# some coment deb http://www.cecak.cz/debian/squeeze/php4/amd64/ ./
Sources are available at build directory.
_____________________________________________ < Really switch on PHP5, PHP4 is unsecure! :) > ---------------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || ||