Idoc re triggring issue

Hi friends,

for my customer request i have given them 2 days full volume of GLPCA Line item list and corresponding Idoc list.

Like Idoc = PCA= PCA Doc list i have given to him in an excel sheet, it's having more than 800 idocs, now customer is asking to re trigger that idoc's, Please help me on this how to re trigger that total idoc's at a time.

Thanks

Sloka