Auto correcting missing data

[binky]

Good evening folks, this forum has been very helpful, but I have one last hurdle I am trying to overcome.

I have two tables with a one to one relationship (T1 and T2). Example data looks like:

T1:
Field1             Field2 (PK1 to T2)
----------------------------------
1111111                   1
1111111                   2
1111111                   3
1111111                   4
2222222                   5
2222222                   6

T2:
Field1        Field2        Field3        Field4 (FK to T1)
-----------------------------------------------------------------
"Some string"    "BA"        1        1
"HUGE STRING"    "BA"        0        2
"striiiiing"                    Null        0        3
Null        Null        1        4
Null        Null        0        5
Null        Null        0        6

What I need to do is copy the contents of Field2, Field3, and Field1 in T2 so that each record from T1.Field1 has the same data in T2. I have 50,000
odd records, so I can't do it manually. Ideally, in the above scenario, the end result would like:

T2:
Field1        Field2        Field3        Field4 (FK to T1)
-----------------------------------------------------------------
"HUGE STRING"    "BA"        1        1
"HUGE STRING"    "BA"        1        2
"HUGE STRING"    "BA"        1        3
"HUGE STRING"    "BA"        1        4
Null        Null        0        5
Null        Null        0        6

For T1.F1: Take the largest value of T2.Field1 and copy it into all the fields in T2.F1 for the instance of T1.F1. Does this make sense? Probably not :/