Hey guys this is my 1st post here n i've been foloowing the kof games since 97. Juz a question concerning LDM activation in kof2k3... How do u activate an LDM which requires u to

,hcb,qcf,qcb,etc....
For example, K' (my fave character) Chain Drive:

,hcb+AC
It's so hard for me to perform this move since mostly i only button mash.
2nd part of activating chain drive(hcb+AC) how do u press it? Izzit at the time when u are doing

do u press AC as well or at the moment u press the back button do u press AC? I need to clear my doubts in this.
Any tips are appreciated too.
Thx.