Thanks for the feedback everyone; Reb, praise from you, the ACW master, is very much appreciated.
The "grass" is actually "teddy bear fur", which you can buy at any fabric store. I buy it in 2 foot by 2 foot sections, then I "dye" it with craft paint, rubber gloves and many comb throughs so it does not matt down. As Fish pointed out, the beauty of the matt is you can put foam sections under it to give the appearance of hills, (Fish, you nailed me good as I am going to do a MASSIVE French Cavalry charge at Waterloo diorama soon and use the technique you suggested!!).
As far as the flags, aren't they spot on? They are made by a great guy here in the US called ironically enough "The Flag Dude" and they are superb. The lads from TM Terrain carry his flags over in the Uk and he does them for 15mm, 20mm and 28mm figures and I have told him to do them for 54mm figures, they'd be a HUGE hit................