How do you put Arnold corp rear-mounted bagger for mtd and yard-man riding mowers - for 2002--09 mtd and yard-man mowers with 38in and 42in decks togethier?

Well, the model should be a 190-063-000, 190-103-000, OEM 190-063 or OEM 190-103. I would bet on the latter two. Arnold Corp. is a division of MTD, so they are OEM equipment. a parts breakdown would be at the first link below. The second link is for the manual and you must enter the first model number listed above and use a 1 for the serial number. Pick the first in the list, the 770-7212j to get the manual.