A way to "integrate" a mod's playtime into the main games playtime?

Hey, r/halflife! Basically, I play a lot of hl1 mods. And when I mean a lot, I don't lie, I would guess my total playtime of mods to be around 300-500 hours. Now, my question: Is there any way that the playtime of the mods can be counted towards my main copy of Half Life? I have 23 hours played on it, but I kind of want to boost that to keep track of how much time I spent with mods.

Maybe via the "Change Game" function in Half Life itself?