MLS Deal finding - 2 part question

[Adam Craig]

This applies to the MLS -

I am currently getting the daily update email for new properties and price reductions that meet my preselected criteria from my realtor. He is a good guy and I want him to get the commission for all the houses he as shown me so far.

So what do I do when I see a new MLS listing that just hit the market and I want to go see it right away. This happens fairly often and this poor guy will be driving all over town to make peanuts. Can I have the lock box conversation with him - is it common for investors to get codes for the houses to save time.

This leads me to my second question. Are investors typically loyal to one realtor? And do I need my own realtor to make an offer or can the listing agent make my offer. For instance - I find a foreclosure on the MLS that I want to go see - Can I just call that listing agent for the showing and then have them make my offer?

Thanks!