Question : Modify DHCP scope on cisco pix 501

Hi Experts.  Ok, last night I had a Cisco engineer on-site with me at a customer's office and he installed a new pix (customer couldn't afford ASA).  He set up the dhcp scope and during our brief testing, the server and a pc could get right out to the world.  This morning, the customer was experiencing very, very slow internet browsing.  After I did some checking, I noticed the dhcp scope had the wrong DNS server config and the computers were getting the wrong setting.  The Cisco engineer is MIA today......

Long story short, I need to get the customer back up and running but I am not a Cisco engineer which is why I sub-contracted this part out.  Can someone please give me the steps (not a link because I really don't have the time to try things out after the client has been experiencing this all day)?  

Thank you experts!!

Answer : Modify DHCP scope on cisco pix 501

disregard, my last post - you should enter the ip! Its getting late here, what is missing is going into configuration mode, so after entering enable and the password, enter:

config t

to enter global configuration mode, then the commands from my first response. Sorry for the confusion, it is getting late here ;)