Installing PEAR (cache)

I downloaded the PEAR cache package and unzipped. Now what do I do with those files and to use it in my php code can I just use "include 'Cache/DB.php';" in my code?? I got this line of code from a book. thanks for any help.

ok, I finally figured out how to install the PEAR db (I'm guessing you just have to double click the "go-pear.bat" file and follow the instructions).

now I have another problem. I get an error when I try to use fetchRow(). this is the error I am getting:
Fatal error: Call to undefined function: fetchrow() in CHP Filesapache_test_2.php on line 26

THIS IS MY CODE.

$cache = new Cache_DB('file',array('cache_dir'=>'.','filename_prefix'=>'quiery_'),86400);

$ab = $cache->query("SELECT * FROM service");
while ($row = $ab->FetchRow()) {
echo "hi there";
}