You can do this....
EXPORT DOCUMENT 'EXPENSE CLAIM' TO FOLDER 'C:\expense'+ExpenseClaim.ExpenseClaimNumber+'\'
I use similar for Expense Claims. I export an Expense Claim and then all of the Receipts to a unique folder.
Then I use PDF Combine Pro X to merge the Expense Claim PDF and all of the Receipts into a single PDF...
EXECUTE PROGRAM 'C:\Program Files (x86)\PDF Combine Pro X\PDFCombineProX.exe C:\expense'+ExpenseClaim.ExpenseClaimNumber+'*.* C:\expense'+ExpenseClaim.ExpenseClaimNumber+'\'+ExpenseClaim.ExpenseClaimNumber+'.pdf'
IMPORT DOCUMENT ExpenseClaim.ExpenseClaimDocument FROM 'C:\expense'+ExpenseClaim.ExpenseClaimNumber+'\'+ExpenseClaim.ExpenseClaimNumber+'.pdf'
Happy to show you all of the Process Steps if you need.