Messing with block generation rate

[Lolcust]

Could someone kindly explain to me the intricacies of modifying the target calculation (and thus, block generation rate) in the source ?

My coding skills are quite inferior, but I'm determined to figure this one out

P.S.:
I did read the wiki https://en.bitcoin.it/wiki/Difficulty (whether I understood it is something I am not certain about )

Edit: Got   help from sacarlson! Kudos!