PEAR installation where PEAR not supported

I have an account at 1&1 that does not 'support' PEAR. When I run anything with a PEAR function, it returns a function not found error, etc. I especially want to use DB.php - the db connection class. Can I install PEAR on in my own folders (I believe I can)? And how do I set things up in my folders to use PEAR effectively. (I tried to do so by just putting the typical PEAR folder in the main folder, but it did not seem to work properly). Thanks!